alexa Detection of serum antibodies to M. leprae major membrane protein-II in leprosy patients from Indonesia.
Pharmaceutical Sciences

Pharmaceutical Sciences

Journal of Clinical & Experimental Pharmacology

Author(s): Hatta M, Makino M, Ratnawati, Mashudi, Yadi,

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Abstract BACKGROUND: Sero-diagnostic methods are the easiest way of diagnosing an infectious disease in developing countries. In leprosy, phenolic glycolipid-1 (PGL-I) based methods for the detection of leprosy are currently available, but the use of these methods has been hindered due to the inherent problems of sensitivity. We previously showed that antibodies to Major Membrane Protein-II (MMP-II) derived from Mycobacterium leprae could be used to diagnose leprosy in Japan. METHODS: Sera from patients and healthy individuals were collected with informed consent and the anti-MMP-II antibody levels of the sera were measured by enzyme-linked immunosorbent assay. The study was conducted at South Sulawesi and Bali, in Indonesia. The study population included 40 each of multibacillary leprosy and paucibacillary leprosy patients, 30 tuberculosis and 16 patients with typhoid. RESULTS: We evaluated the anti-MMP-II antibody levels in Indonesian individuals. The cut-off value was determined from receiver operator characteristic curve as 0.124 using the O.D. titers for patients with multibacillary leprosy, so that the sensitivity of the test was 97.5\% and the specificity taking healthy individuals as controls was 984\%. Using the determined cut-off values, 98\% of multibacillary (MB) leprosy and 48\% of paucibacillary (PB) leprosy patients had positive levels of anti-MMP-II antibodies, 13\% of patients with typhoid and 22\% of the household contacts of MB leprosy had positive levels of anti-MMP-II antibodies. CONCLUSIONS: Our results suggest that measuring anti-MMP-II antibody levels could facilitate the detection of leprosy in endemic countries.
This article was published in Lepr Rev and referenced in Journal of Clinical & Experimental Pharmacology

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